36889921 has 2 divisors, whose sum is σ = 36889922. Its totient is φ = 36889920.

The previous prime is 36889903. The next prime is 36889987. The reversal of 36889921 is 12998863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 408321 = 6040^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 36889921 - 2⁹ = 36889409 is a prime.

It is not a weakly prime, because it can be changed into another prime (36889121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18444960 + 18444961.

It is an arithmetic number, because the mean of its divisors is an integer number (18444961).

Almost surely, 2^36889921 is an apocalyptic number.

It is an amenable number.

36889921 is a deficient number, since it is larger than the sum of its proper divisors (1).

36889921 is an equidigital number, since it uses as much as digits as its factorization.

36889921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 36889921 is about 6073.7073521861. The cubic root of 36889921 is about 332.8913995648.

The spelling of 36889921 in words is "thirty-six million, eight hundred eighty-nine thousand, nine hundred twenty-one".